On Mar 5, 10:47Â*am, " wrote:
On Mar 5, 11:03�am, wrote:

Great advice. �I like the idea of plumbing the hot water into the cold
supply and feeling for a hot spot. �However, I'll just recommend they
get a company that has a tester.

My BIL had to have his entire house redone through the attic and it
was quite an extensive job.

PEX helps a lot to replumb a home today

Are you sure they are not hearing things. With all water usage
stopped, does the water meter show any usage. I would start there,
and then go to the other suggestions posted.